: Design pressure is typically set at the operating pressure plus a safety tolerance, often around Wall Thickness Calculation : Following ASME B31.3 , the required thickness (
Testing, inspection, and safety margins
Once the pipe size is selected, you must ensure it can withstand its internal pressure without failing. This is the pressure rating section of the module. The primary tool for this is the (applicable to petroleum refineries, chemical plants, pharmaceutical plants, etc.).
Minor head loss is calculated as a fraction of the velocity head: : Design pressure is typically set at the
The first half of a typical module like this is dedicated to hydraulics—the study of fluids in motion. Before you can size a pipe, you must understand the forces at play. This section is built on a few key pillars:
) for internal pressure, ASME B31.3 utilizes the following equation:
How to use this module (recommended workflow) Minor head loss is calculated as a fraction
The and its operating state (liquid, gas, or two-phase)
hf=f⋅LD⋅v22gh sub f equals f center dot the fraction with numerator cap L and denominator cap D end-fraction center dot the fraction with numerator v squared and denominator 2 g end-fraction = head loss (meters or feet)
Fluid flow in process piping is classified using the dimensionless Reynolds Number ( It's the synthesis of fluid dynamics, material science,
The knowledge contained within a "Module 3 Process Piping Hydraulics Sizing and Pressure Rating" is the essential toolkit for any engineer working with fluid transport. It's the synthesis of fluid dynamics, material science, and economic analysis, all codified into a practical workflow.
): Fluid flows in parallel layers with minimal mixing. This is common in highly viscous fluids like heavy oils. Critical/Transitional Flow (
What (e.g., Carbon Steel, Stainless Steel) are you planning to use?